Cushion diamond drill chuck



Aug- 23, 1932 o. B. ANDERSON 1,873,173

CUSHION DIAMOND DRILL CHUCK Filed Oct. 5. 1929 Patented ug. 23,1 1932 onor B. ANDERSON, or* 'ivrARouEkfrrn ivriOriIGANAssIGNOB To" E. J. LONGYEAni/LANU- FACTUMNG Oo.,=or 1i/IIN:NiiAroL1s,` MINNESOTA, A CORPORATION or DELAWARE f'fnppncti'n mee october '5, 192e. Yserial No. 397,537.

' Myfinvention relates to chucksfor holding drills suchas is used in drilling holes'- for exploratiomandhas for its principal Object the provision of means wherebythe chuck is cushioned. on `its `mountingv'so that any unevenness Iat the face of the drill bit such as is caused by. irregularities of theground through which the bit is passing may be prevented from damaging the bit. y

It is `also a vpurpose of this invention to provide a cushioned means of this character wherebythe vibration of the bitfcausedby irregularities of the ground being drilled may be kept from reaching the drilling inachine. This resultsin a considerable savingV on the machinebecause such vibration does a great deal ofdamage to a machine-whichis used 1 continually .and .shortens the life of the machine to a considerable degree.

In the drawing- Fig. 1 is a horizontal section taken through the drill chuck and its mounting on line 1 1 of Fig. 2; and i Fig. 2 is a vertical section showing the interior construction of the chuck.

Referring now in detail to the drawing, the chuck consists of a head or chuck proper designated by the numeral 3. This chuck carries the gripping jaws such as 4 and 5 which areA adjustable to grip the drill stem or release it, the set screws such as 6 and 7 being provided for closing the gripping jaws. This chuck'is screw-threaded at 8 to receive an outer sleeve 9 which extends upwardly from the chuck and is provided with an opening 10 at its upper end through which the driving sleeve 11 that is normally screwed onto the spindle 12 of the machinepasses.

Now the outer sleeve 9 has around its inner sleeve to prevent relative turning motionl between the sleeve 9 and 11 while permitting a sliding motion axially thereof. The portion 15 is, of course, preferably made integral with the sleeve 11, and the lugs 13 are' lpreferablymade integral with the sleeve 9. Portion 15 is grooved as shown at` 16 and 17 to providevanannular groove between the sleeve 11 and its o'uter grooved portion These grooves are notparticularly essential, but they formv an ideal bearing recess forone end of `each of the coil springs 18 and 19, the opposite'ends of these coil springs engaging respectively the end of the sleeve 9 and the top of the chuck 8. Sleeve 11 extends into a recess 2O formed in the .top of the chuck which recess is preferablydeep`enoughl to permit a verticalsliding motion to the full extent allowed by the springs 18 andf19'.

Now the action of the device in case of the drill bit which is held in the chuck striking 'some unevenness that would` cause itto. exert a greater pressure upwardly is to com-jn press lthe spring 19 thus moving the sleeve 9 upwardlyrelative to the sleeve 11 lrather than to transmit the-j ar directlyto the sleeve 11 and the spindle`1'2. The heavy vsprings A18l and V19 serve to effectively damp out the vi-V brationsof the chuckbefore they are trans-v mitted' to the spindle L12 and by it tothe mai chine itself.v The parts of .the cushioning meansAk are, of course, enclosed between the sleeves` 9 and 11 so that they are fully protected and may with proper oiling last' at least the :lengthof life of the 'chuck itself -From the above description `it is thought' that the construction and advantages of this invention will be clear tothose skilledin thisv art: Itisv also believed to `be obviousvthat various `modifications Vmay be made from the details describediwithout departing from the scope of the invention kas defined by the appended claims.v y

' Having thus described my invention, what I claim as newand desire to secure by Letters Patentisz, t. j ,v 1. Cushioning means for drills and the like i i 1873173 e su j Sfr

comprising a Chuck, va spindle,.a sleeve car-A ried by said, chuck, asleeve on said spindle, 9

` movement therebetween, said sleeves also havlngrmembers limiting relative axial move-I y y Yspindle and springs between saidshoulder's.

' shoulders.

opposing said axial movement in both directions. y

2. Cushioning means for drills and the like comprising a chuck, a spindle, a sleeve carried by said chuck, a sleeve on said spindle, said sleeves having longitudinally running interengaging portions preventing rotative ment therebetween, and cushioning means interposed between said sleeves for retarding such axial movement in both.. directions.

3. Cushioning means lor drills'and the like comprising a chuck, a spindle, a Sleeve cars p ried by said chuck, a sleeve on said spindle, saidsleeves having longitudinally running interengaging Vportions 'preventing rotative movement therebetween, said sleeves also having members limiting relative axial movement therebetween, and resilient means len` closed by said sleeves Vfor opposingsuch axial movement in both directions. f l

4.' Cushioning means for drills and the like comprising a chuck, a spindle, a-sleeve 'carried `by said chuck, a sleeve on said spindle, said sleeves vhaving longitudinally run-ning interengaging vportions preventing rotative movement therebetween, said sleeves also having members limiting relativeaxial mov-e'- `ment therebetween, and afpair ofcoiled springs'interposed between said sleeves for opposing such axial movement in both direc-v tions. I

5.. Cu-sh'ioning means for drills and the like comprising a chuck, a spindle, a sleeve carried byY said chuckand means Vcarried by said spindle -ex-tendinginto said sleeve,/said means 'cooperating withvsaidlsleeve to prevent .relative rotation between said spindle vand chuck and having 'cushioning-means yieldingly permittinlg a `limited axial movement Abetween said chuck and spindle in both directions.

f6. Means for cushioning axial'th'rust between lthe chuck head and drive spindle of a drilling machine ycomprising coaxial -memvbers fixed to the chuck and drive'spindle respectively, elements on said membersengaging each other to transmit rotationlof .said spindle'to said chuck, the members being slidf able longitudinally relative -to each other, longitudinally-spaced stopson one oflsaidy members, `and shoulders von the othermembe'r between said stops, and yielding,r means'interposed ibetweensaid stops and shoulders.

7. Cushioning means -forgdr-ills and rthe .like comprising a chuck, a spindle coaxial there-` with, said chuck and spindlehaving longitudinally extending interengagi-ng .portions connecting them together` for- ',rdtational movement but permitting vaxial movement therebetween, longitudinally spaced shoul-A ders on said chuck and spindle limiting axial movement of the chuck relatively tothespi-n-l dle, andy cushioning l means between said 8. Cushionin means for drills and the like comprising a c uck, a spindle coaxial therewith, said chuck and Spindle having longitudinally extending interengaging portions connecting them together forr rotational movement but permitting axial movement therebetween, longitudinally spaced shoulmovement of the chuck relatively to V,the

9. Cushioning'meansfor drills and the like ycomprising a chuck, a spindle, coaxial Vtelescopings'leeves on said chuck and spindle, said sleeves having 'longitudinally running interengaging portions thereon, transmitting .ders on, said chuck and spindle limiting axial rotative movement of the spindlefto :the l chuck,v cushion members between said sleeves,

andl longitudinally spaced shoulders .between which said cushion members iit, alternate shoulders being lixed to opposite sleeves;

10. .Gushioning means for drills and .the like .comprising a chuck, a spindle, ycoaxial telescoping sleeves on said chuck Vand spindle, .l

said sleeves having longitudinally running interengaging portions thereon, transmitting rotative movement `,of the spindle toi-the chuck,fcoiled springs between saidgsleeves, and longitudinallyspaced shoulders between whichsaid .coiled springsiit, alternate shoul. ders vbeing `iixed .to opposite sleeves.

In witness 'fw-hereof, I .hereunto .subscribe myname this lllthdayzof Sept. JLD., 1929.

Y yOLOFB. ANDERSON.

ist 

